diff --git a/121-Best-Time-To-Buy-and-Sell-Stock.py b/121-Best-Time-To-Buy-and-Sell-Stock.py
index 43f25e419..815bcee59 100644
--- a/121-Best-Time-To-Buy-and-Sell-Stock.py
+++ b/121-Best-Time-To-Buy-and-Sell-Stock.py
@@ -1,10 +1,8 @@
 class Solution:
     def maxProfit(self, prices: List[int]) -> int:
-        res = 0
-        
-        l = 0
-        for r in range(1, len(prices)):
-            if prices[r] < prices[l]:
-                l = r
-            res = max(res, prices[r] - prices[l])
-        return res
+        max_profit = 0
+        min_price = float("inf")
+        for price in prices:
+            min_price = min(price, min_price)
+            max_profit = max(price - min_price, max_profit)
+        return max_profit